There are naturally occurring elements and minerals within Nebraska geology, and with that, it is not uncommon to find them in Nebraska's groundwater. This month, the spotlight series continues with fluoride. FLUORIDE Some naturally occurring fluoride exists in much of Nebraska's groundwater from the erosion of natural deposits.

1. Introduction. From the beginning of human civilization to this date, water resources have been playing a very crucial role on public health, food production and economic development (Asha et al., 2020; Al- Asad et al., 2023, Alam et al., 2020).For the purposes of human consumption and crop cultivation, freshwater resources, especially …

There are naturally occurring elements and minerals within Nebraska's geology, and with that, it is not uncommon to find them in Nebraska's groundwater. Calcium, magnesium, iron, manganese, fluoride, arsenic and uranium are among the elements found in Nebraska. This month, the spotlight series continues with iron and …

USGS Numbered Series: Title: Geochemical conditions and the occurrence of selected trace elements in groundwater basins used for public drinking-water supply, Desert and Basin and Range hydrogeologic provinces, 2006-11: California GAMA Priority Basin Project: Series title: Scientific Investigations Report: Series number: 2014-5173: DOI: 10.3133 ...

It consists of 46 essays grouped into five parts. The topics covered by these essays range from the most basic aspects of ground-water hydrology to the identification and …

Arsenic concentrations in groundwater extracted from quaternary alluvial sediments pose a serious health issue for inhabitants living in several countries in Southeast Asia. A widely approved hypothesis states that reductive dissolution of Fe-bearing minerals releases As oxyanions to ground water and the original source of As …

Major ions, trace elements, and isotope concentrations were measured in 11 representative groundwater samples that were collected from a series of aquifers in the Wugou coal mine, Anhui Province.

The behavior of U- and Th-series nuclides in groundwater. December 31, 2003. Groundwater has long been an active area of research driven by its importance both as a societal resource and as a component in the global hydrological cycle. Key issues in groundwater research include inferring rates of transport of chemical constituents, …

There are naturally occurring elements and minerals within Nebraska's geology, and with that, it is not uncommon to find them in Nebraska's groundwater. Calcium, magnesium, iron, manganese, fluoride, arsenic, and uranium are among the elements found in Nebraska. This month, the spotlight series continues with iron and …

Trace elements include metals, such as lead and iron; metalloids, such as arsenic; and radionclides (radioactive elements), such as radium and radon. Trace elements in our Nation's streams, rivers, and groundwater have natural and manmade sources. Rock weathering, soil erosion, and dissolution of water-soluble salts are …

PC1, which represents the more mobile trace elements in the groundwater, consisted of Li, B, Mn, Fe, As, and Si. PC2 included Al, Ni, Cd, and Sb, and represents ORP-insensitive properties.

Understanding the coupling relationship of typical elements between surface water (SW) and groundwater (GW) is helpful to the prevention of regional water environment pollution. In this study, the coupling of typical elements (C, N, P) of SW and GW in the middle reaches of the Yangtze River was comprehensively analyzed using …

2.2 DGT Sampling Environment. The DGT sampling was performed in situ under the naturally prevalent conditions in the fractures. This allowed the system to work under the groundwater's low-redox conditions (otherwise, Fe(II) will oxidize and capture dissolved REEs) and high pressure (otherwise, CO 2 will be lost, leading to an increase …

Published by the American Geophysical Union as part of the Water Resources Monograph Series, Volume 13. The finite element method is now widely used to solve a variety of important problems in the field of groundwater hydrology. Thus a clear understanding of the method is essential to scientists and engineers working in this field. The goal of this …

Friday, March 26, 2021. Naturally Occurring Elements in Groundwater Part 2 of a Series — Iron and Manganese. Becky Schuerman - Extension Associate, Domestic Water & …

An overview of the general types of applications of analytic elements in ground water modeling is provided in this paper. While not fully encompassing, the applications described here cover areas where the method has been historically applied (regional, two-dimensional steady-state models, analyses of ground water–surface …

Abstract and Figures. The objective of the Australian groundwater modelling guidelines is to promote a consistent and sound approach to the development of groundwater flow and solute transport ...

Becky Schuerman - Extension Associate, Domestic Water & Wastewater. There are naturally occurring elements and minerals within Nebraska geology, and with that, it is …

To identify possible correlations between trace elements of the analysed groundwater and geological events, such as earthquakes and volcanic activity, we …

In the last two decades, meshless methods have been successfully used to model the groundwater flow in porous media. These methods represent the problem domain with scattered and unconnected nodes in contrast to the mesh/grids in FDM/FEM. In the present study, meshless element-free Galerkin method (EFGM) is used to model …

Dynamic monitoring data of the groundwater level form an important basis to understand the current state of groundwater development and utilization, which is required to plan its sustainable exploitation. The dynamic data of groundwater level are typical space-time series data with the characteristics of nonlinear strong space-time …

This is the seventh factsheet of seven in a series that will help Ontario's farmers and rural residents learn more about groundwater. This factsheet reviews water quality testing, the interpretation of water quality test results and commonly available treatment methods for private water wells. The OMAFRA Factsheets in the Groundwater Series ...

An overview of the general types of applications of analytic elements in ground water modeling is provided, covering areas where the method has been historically applied as well as more recent applications. Though powerful and easy to use, applications of the analytic element method are not as widespread as finite‐difference or finite‐element models due …

Regional finite-difference models tend to have large cell sizes, often on the order of 1–2 km on a side. Although the regional flow patterns in deeper formations may be adequately represented by such a model, the intricate surface water and groundwater interactions in the shallower layers are not. Several stream reaches and nearby wells may occur in a …

We analysed temporal variations of trace element concentrations in groundwater from a 101 m-deep borehole (HA01) in northern Iceland during 2010-2018 and compared them with seismic and volcanic events that occurred in the same period to identify potential hydrogeochemical precursors. An increase of …

Physics-based groundwater flow modeling is a useful tool for the design and optimization of pump-and-treat systems for groundwater site cleanup. Numerical methods like finite differences and finite elements, and hybrid analytic elements, require boundary conditions (BC) to be assigned to the outer domain of the grid, mesh, or line elements.

The boundary element method (BEM) has received increased attention as a method capable of solving problems containing material heterogeneity. The search for the efficient codes continues. The new technique expands the potential into a perturbation series and solves the resultant Laplace and Poisson equations, using the existing BEM …

Natural fresh groundwater contains dissolved elements in three categories: major constituents; minor constituents; and, trace …

Rare earth elements in our environment are becoming important because of their utilization in permanent magnets, lamp phosphors, superconductors, rechargeable batteries, catalyst, ceramics and other applications. This study was conducted to evaluate the level of rare earth elements (REE) and the variability of their anomalous behavior in …

111 Altmetric. Metrics. Abstract. Redox-driven biogeochemical element cycles play a central role in converting organic matter in aquatic ecosystems. They also …